code: def input_type(self) -> t.Any:
      return str
  
file_path: BentoML/tests/unit/_internal/io/test_base.py
imports: from __future__ import annotations
  import typing
  from typing import TYPE_CHECKING
  import pytest
  from bentoml.io import IODescriptor
label_desc: Use image node_id 9 for calling the DummyDescriptor obj's underlying member method code with example usage: obj.input_type() and returns: str